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Finding the Fourth Proportional to 361.45, 498.39 and 286.63

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Solution

The fourth proportional to 361.45, 498.39 and 286.63 is: 395.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.45 : 498.39 = 286.63 : x
  2. Step 2: Convert to fraction form
    361.45/498.39 = 286.63/x
  3. Step 3: Cross multiply
    361.45x = 498.39 × 286.63
  4. Step 4: Simplify right side
    361.45x = 142,853.53
  5. Step 5: Solve for x
    x = 142,853.53/361.45
  6. Step 6: Final answer
    x = 395.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.